Transmission oil and filter were changed about 10K ago. I may in fact have a bad flex disc, but surely it wouldn't make the driveshaft turn when the car is stopped?

I'll try the TransX, I'm sure it wouldn't hurt. Another thing that the
tranny does is this: First thing in the morning it will always back up just fine but when you put it in drive, it will hesitate like it is out of gear. When the revs come up, it will lurch into gear and go.
It never does this the rest of the day.

Thanks for the suggestions.

__________________
Dave

1982 300D
352,000 miles